Machine for the torrefaction of coffee.



I Patented May 6, 1902. F. C. THIEL. MACHINE FOR THE TURREFACTIDN 0FCOFFEE.

(Application filed Aug. 3, 1901.)

2 Sheets-Sheet I.

(No Model.)

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0.. 699,426. Patented May 6, I902.

F. c. THIEL.

MACHINE FOR THE TDBREFACTION 0F COFFEE.

(Application filed Aug. 3, 1901.) (No Model.) 2 Sheets-Sheet z.

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UNiTnn STATES PATENT OFFICE.

FRANQOIS CHARLES THIEL, OF PARIS, FRANCE.

MACHINE FOR THE TORREFACTION OF COFFEE.

SPECIFICATION forming part of Letters Patent N 0. 699,426, dated May 6,1902.

Application filed August 3, 1901- Serial No, 70,779. (No model.)

To (tZZ whom it may concern:

Be it known that. I, ERANooIs CHARLES THIEL, a citizen of the Empire ofAustria- Hungary, and a resident of Paris, France, have invented certainnew and useful Improvements in Coffee-Roasters, of which the followingis a specification.

The object of this invention is a torrefyingmachine provided with asphere having a compound rotative movement assuring an equaltorrefaction of all substances placed therein and can be used fortorrefying, drying, or mixing any substances. It can also be used forpolishing metals and may be heated by any suitable heating device. Thesphere is so arranged that the compound rotative motion can be changedinto a single rotative movement by altering the axis of its rotation.

In the accompanying drawings, Figure 1 is an elevation view of thedevice. Fig. 2 is a vertical section on A B of Fig. 1 with the cap takenoff, the sphere being in position for a compound movement. Fig. 3 showsthe same section as in Fig. 2, but with the sphere in position for asingle movement.

The device consists of a hollow inetalsphere 1, provided at each endwith pivots 2 3, diametrically opposite each other. These pivots canturn freely in two circular holes made diametrically opposite each otherin a suitable metal ring 4, provided at the extremities of a diametricalline at right angles to the axis with the small pivots 2 3 and theenlarged part 9 provided with a cylindrical hole.

The reference-numeral 7 represents the spindle of the crank 8, the endof the said spindle being screw-threaded and fastened to the ring 4 bymeans of a nut 10. The cylindrical hole allows the passage at 9 of aspindle, to the end of which is suitably fastened the toothed wheel 12.

Outside the ring 4, which turns freely upon the spindle of the wheel 12,this spindle is provided with a square part 11 and ends in a cylindricalpart 13, the object of which will be hereinafter described. The saidspindle by means either of its square or cylindrical part rests on thebottom of a notch 14, made in the wall of the receptacle 15, containingthe source of heat, and the spindle 7 of the crank rotates in a verticalnotch 16, made in the cylindrical side of the said receptacle.

This wall is strengthened by the plates 17 and 18,riveted thereon. Atoothed wheel 19, fixed to the sphere 1, gears with the wheel 12. Thetoothed wheel 19 is of a smaller diameter than the wheel 12, causing anequatorial point of the sphere after having performed curves to returnafter a certain number of revolutions determined by a certainproportion-in the diameters of the wheels 19 and 12 to itsstarting-point, and so on. By way of example, for the proportion 18 :24the said point returns to its starting-point after three revolutions ofthe metal ring.

The two ends of the strengthening-ring 20, fixed to the edge of thereceptacle 15, are bent outwardly, and each of them is provided with ahole 21, through which passes a peg in order to prevent the spindle 7from leaving its notch during the rotation.

The sphere is furnished with an opening for filling and emptyingpurposes, which may be covered with a plate 22, having a handle 23sliding in the guides 24. A suitable stop 25 limits the length of thestroke of this plate.

The manner of using this device is as follows: If it is desired to givea simple rotative motion to the sphere, the shaft of the wheel 12 isarranged in such a way that the cylindrical portion rests in the slot14.- It then the handle 8 is rotated the said shaft will rotate freelyin the slot 14 and the ring 4. The same rotative motion will be conveyedto the sphere 1 with its Wheel 19 and to the wheel 12 with its shaft. Ifa com pound motionof the sphere is required, the shaft of the crank ispushed toward the interior of the receptacle above mentioned. The squareportion 11 of the shaft of the wheel 12 engages the slot 14. The saidshaft is thus rendered immovable. The rotative movementimparted by thecrank to the ring 4, and consequently to the sphere 1, produces, by thegearing of the wheel 19 with the fixed wheel 12, a compound movement ofthe sphere in such a way that when used for torrefaction all parts ofthe surface of the sphere come successively in contact with the directflames of thesource of heat and are thus equally heated. If a mixing ofsubstances in the sphere is desired, this will be effected verythoroughly. In order to bring the device back to a positioncorresponding to a simple rotation of the sphere,

1116'811211} 7 is Withdrawn. The cylindrical part 13 is then placed inthe notch 14.

Having now fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In a machine of the character described, the combination with acasing, a ring rotatably secured in said casingga spindle, a square andcylindrical end formed on said spindle, a spherical casing". revolublymounted in said ring, wheels 12 and 19 arranged Within said ring forrevolving said spherical casing, and means to rotate said ring.

2. In a coffee-roaster, the combination of an outer casing, a. furnacearranged in said casing, a crank-shaft secured in said casing,

FRANQOIS CHARLES THIEL.

Witnesses:

ADOLPHE SPURM, EDWARD P. MAOLEAN.

